title: Early events in the development of the immune system of Xenopus laevis: characterization of lymphocytes in two-day-old embryos.
mesh_terms: D000818:Animals; D000921:Antibody-Producing Cells / Q000276:immunology; D002469:Cell Separation; D004625:Embryo, Nonmammalian / Q000276:immunology*; D007111:Immunity, Cellular; D007147:Immunoglobulin Light Chains; D007075:Immunoglobulin M; D008214:Lymphocytes / Q000276:immunology*; D012333:RNA, Messenger / Q000276:immunology; D014982:Xenopus laevis / Q000196:embryology / Q000276:immunology*
chemical_list: D007147:Immunoglobulin Light Chains; D007075:Immunoglobulin M; D012333:RNA, Messenger